z/OS V1R4.0 MVS Initialization and Tuning Reference: Section 2.7 - Indirect volume serial support, at http://publibfp.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/iea2e230/2.7, and Section 2.8 - Using indirect volume serial support, at http://publibfp.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/iea2e230/2.8.